<div class="container">
    <h1>My First Attribute Directive</h1>
    <p my-high-light highlightColor="#ff3300">内容高亮显示！</p>
    <div *ngFor="let item of [1,2,3]">
        <card *appDelay="500 * item">
            第 {{item}} 张卡片
        </card>
    </div>
</div>